As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST AFTER TAKEOFF, PILOT SELECTED LG IN RETRACT POSITION, GEAR INTRANSIENT LIGHT REMAINED ILLUMINATED. THE PILOT TRIED TO CYCLE GEAR TWO ADDITIONAL TIMES WITH THE SAME RESULT. THE PILOT NOTIFIED TOWER OF THE SITUATION & RETURNED. THE TOWER DECLARED AN EMER & THE PILOT LANDED WITHOUT FURTHER INCIDENT. TROUBLESHOOTING REVEALED FROZEN UPLOCK ROLLER ON THE RT MLG. R & R ROLLER WITH NEW UNIT. PERFORMED LG OPERATION CHECK, ALL SYS CHECKS WERE NORMAL.